PART III. Describa con sus propias palabras que hacen los siguietes querys a. select course_id, sec_id, count (ID) from section natural join takes where semester = 'Autumn, and year = 2009 group by course_id, sec_id; b. select max(enrollment) from (select count(ID) as enrollment from section natural join takes where semester = 'Autumn , and year = 2009 group by course id, sec id); c. select distinct student.ID, student.name from (student join takes using(ID)) join (instructor join teaches using(ID)) usinglcourse_id, sec_id, semester, year) where instructor.name = 'Dale. ; d. The result of an SQL query is: Relation View Query Tupla e. What is the difference between Cartesian product and natural join